<!DOCTYPE html>
<html lang='en'>

<head>
  <meta charset='UTF-8'>
  <meta http-equiv='X-UA-Compatible' content='IE=edge'>
  <meta name='viewport' content='width=device-width, initial-scale=1.0'>
  <title>Document</title>
  <script src='https://cdn.jsdelivr.net/npm/vue/dist/vue.js'></script>
</head>

<body>
  <div id='app'>
    <span>
      <label for="email">邮箱</label>
    <input type="checkbox"  id="email" v-model="message" value="邮箱">
    </span>
    <span>
      <label for="number">电话</label>
      <input type="checkbox"  id="number" value="电话" v-model="message">
    </span>
    <span>
  <label for="qq">QQ</label>
  <input type="checkbox"  id="QQ" value="QQ" v-model="message"> 
</span>
    <h2>message: {{message}}</h2>
  </div>
  <script>
    const app = new Vue({
      el: '#app',
      data: {
        message: []
      }
    })
  </script>
</body>

</html>